Existing Basement Lights - Finishing Basement

Hi All,

I'm finishing my basement and I have a 60A sub panel ready to go.

However the builder had already installed those cheap pull string lights at various places throughout my basement. Do I need to tie that circuit into my basement sub panel or can I just remove the light fixtures and terminate the wiring? Right now those lights are fed by my main circuit panel which is upstairs...

Any suggestions? What do most people do with existing basement light wires?